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<div class="title">FirstOrderIIRFilter.h</div>  </div>
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<a href="../../da/d73/_first_order_i_i_r_filter_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;</div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="preprocessor">#ifndef PROJECT_FIRSTORDERIIRFILTER_H</span></div><div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="preprocessor">#define PROJECT_FIRSTORDERIIRFILTER_H</span></div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;</div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="preprocessor">#include &lt;cmath&gt;</span></div><div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;</div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T, <span class="keyword">typename</span> T2&gt;</div><div class="line"><a name="l00018"></a><span class="lineno"><a class="line" href="../../dc/d6f/class_first_order_i_i_r_filter.html">   18</a></span>&#160;<span class="keyword">class </span><a class="code" href="../../dc/d6f/class_first_order_i_i_r_filter.html">FirstOrderIIRFilter</a> {</div><div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160; <span class="keyword">public</span>:</div><div class="line"><a name="l00026"></a><span class="lineno"><a class="line" href="../../dc/d6f/class_first_order_i_i_r_filter.html#a85fc4b99f4589822abe3fa924e6d96a6">   26</a></span>&#160;  <a class="code" href="../../dc/d6f/class_first_order_i_i_r_filter.html#a85fc4b99f4589822abe3fa924e6d96a6">FirstOrderIIRFilter</a>(T2 cutoffFrequency, T2 sampleFrequency, T&amp; initialValue) {</div><div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;    <a class="code" href="../../dc/d6f/class_first_order_i_i_r_filter.html#aff8c38c9281f6920f0715485f22fd948">_alpha</a> = 1 - std::exp(-2 * M_PI * cutoffFrequency / sampleFrequency);</div><div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;    <a class="code" href="../../dc/d6f/class_first_order_i_i_r_filter.html#aaeb04a80e96ed5d4d72bd37ffa856965">_state</a> = initialValue;</div><div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;  }</div><div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;</div><div class="line"><a name="l00036"></a><span class="lineno"><a class="line" href="../../dc/d6f/class_first_order_i_i_r_filter.html#a3b3db52338d746113e81c4004e2d297a">   36</a></span>&#160;  <a class="code" href="../../dc/d6f/class_first_order_i_i_r_filter.html#a3b3db52338d746113e81c4004e2d297a">FirstOrderIIRFilter</a>(T2 alpha, T&amp; initialValue)</div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;      : <a class="code" href="../../dc/d6f/class_first_order_i_i_r_filter.html#aaeb04a80e96ed5d4d72bd37ffa856965">_state</a>(initialValue), <a class="code" href="../../dc/d6f/class_first_order_i_i_r_filter.html#aff8c38c9281f6920f0715485f22fd948">_alpha</a>(alpha) {}</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;</div><div class="line"><a name="l00044"></a><span class="lineno"><a class="line" href="../../dc/d6f/class_first_order_i_i_r_filter.html#a6b1e22e84349dfe5b4c166a9d46c5d4b">   44</a></span>&#160;  T <a class="code" href="../../dc/d6f/class_first_order_i_i_r_filter.html#a6b1e22e84349dfe5b4c166a9d46c5d4b">update</a>(T&amp; x) {</div><div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;    <a class="code" href="../../dc/d6f/class_first_order_i_i_r_filter.html#aaeb04a80e96ed5d4d72bd37ffa856965">_state</a> = <a class="code" href="../../dc/d6f/class_first_order_i_i_r_filter.html#aff8c38c9281f6920f0715485f22fd948">_alpha</a> * x + (T2(1) - <a class="code" href="../../dc/d6f/class_first_order_i_i_r_filter.html#aff8c38c9281f6920f0715485f22fd948">_alpha</a>) * <a class="code" href="../../dc/d6f/class_first_order_i_i_r_filter.html#aaeb04a80e96ed5d4d72bd37ffa856965">_state</a>;</div><div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;    <span class="keywordflow">return</span> <a class="code" href="../../dc/d6f/class_first_order_i_i_r_filter.html#aaeb04a80e96ed5d4d72bd37ffa856965">_state</a>;</div><div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;  }</div><div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;</div><div class="line"><a name="l00052"></a><span class="lineno"><a class="line" href="../../dc/d6f/class_first_order_i_i_r_filter.html#a11abac204c75fb6ef53e830d052dfab1">   52</a></span>&#160;  T <span class="keyword">get</span>() { <span class="keywordflow">return</span> <a class="code" href="../../dc/d6f/class_first_order_i_i_r_filter.html#aaeb04a80e96ed5d4d72bd37ffa856965">_state</a>; }</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;</div><div class="line"><a name="l00054"></a><span class="lineno"><a class="line" href="../../dc/d6f/class_first_order_i_i_r_filter.html#a61a75162159729879b260f13e43a39d3">   54</a></span>&#160;  <span class="keywordtype">void</span> <a class="code" href="../../dc/d6f/class_first_order_i_i_r_filter.html#a61a75162159729879b260f13e43a39d3">reset</a>() { <a class="code" href="../../dc/d6f/class_first_order_i_i_r_filter.html#aaeb04a80e96ed5d4d72bd37ffa856965">_state</a> *= T2(0); }</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160; <span class="keyword">private</span>:</div><div class="line"><a name="l00057"></a><span class="lineno"><a class="line" href="../../dc/d6f/class_first_order_i_i_r_filter.html#aaeb04a80e96ed5d4d72bd37ffa856965">   57</a></span>&#160;  T <a class="code" href="../../dc/d6f/class_first_order_i_i_r_filter.html#aaeb04a80e96ed5d4d72bd37ffa856965">_state</a>;</div><div class="line"><a name="l00058"></a><span class="lineno"><a class="line" href="../../dc/d6f/class_first_order_i_i_r_filter.html#aff8c38c9281f6920f0715485f22fd948">   58</a></span>&#160;  T2 <a class="code" href="../../dc/d6f/class_first_order_i_i_r_filter.html#aff8c38c9281f6920f0715485f22fd948">_alpha</a>;</div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;};</div><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;</div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;<span class="preprocessor">#endif  // PROJECT_FIRSTORDERIIRFILTER_H</span></div><div class="ttc" id="class_first_order_i_i_r_filter_html_a6b1e22e84349dfe5b4c166a9d46c5d4b"><div class="ttname"><a href="../../dc/d6f/class_first_order_i_i_r_filter.html#a6b1e22e84349dfe5b4c166a9d46c5d4b">FirstOrderIIRFilter::update</a></div><div class="ttdeci">T update(T &amp;x)</div><div class="ttdef"><b>Definition:</b> <a href="../../da/d73/_first_order_i_i_r_filter_8h_source.html#l00044">FirstOrderIIRFilter.h:44</a></div></div>
<div class="ttc" id="class_first_order_i_i_r_filter_html_a61a75162159729879b260f13e43a39d3"><div class="ttname"><a href="../../dc/d6f/class_first_order_i_i_r_filter.html#a61a75162159729879b260f13e43a39d3">FirstOrderIIRFilter::reset</a></div><div class="ttdeci">void reset()</div><div class="ttdef"><b>Definition:</b> <a href="../../da/d73/_first_order_i_i_r_filter_8h_source.html#l00054">FirstOrderIIRFilter.h:54</a></div></div>
<div class="ttc" id="class_first_order_i_i_r_filter_html_aaeb04a80e96ed5d4d72bd37ffa856965"><div class="ttname"><a href="../../dc/d6f/class_first_order_i_i_r_filter.html#aaeb04a80e96ed5d4d72bd37ffa856965">FirstOrderIIRFilter::_state</a></div><div class="ttdeci">T _state</div><div class="ttdef"><b>Definition:</b> <a href="../../da/d73/_first_order_i_i_r_filter_8h_source.html#l00057">FirstOrderIIRFilter.h:57</a></div></div>
<div class="ttc" id="class_first_order_i_i_r_filter_html_a85fc4b99f4589822abe3fa924e6d96a6"><div class="ttname"><a href="../../dc/d6f/class_first_order_i_i_r_filter.html#a85fc4b99f4589822abe3fa924e6d96a6">FirstOrderIIRFilter::FirstOrderIIRFilter</a></div><div class="ttdeci">FirstOrderIIRFilter(T2 cutoffFrequency, T2 sampleFrequency, T &amp;initialValue)</div><div class="ttdef"><b>Definition:</b> <a href="../../da/d73/_first_order_i_i_r_filter_8h_source.html#l00026">FirstOrderIIRFilter.h:26</a></div></div>
<div class="ttc" id="class_first_order_i_i_r_filter_html"><div class="ttname"><a href="../../dc/d6f/class_first_order_i_i_r_filter.html">FirstOrderIIRFilter</a></div><div class="ttdef"><b>Definition:</b> <a href="../../da/d73/_first_order_i_i_r_filter_8h_source.html#l00018">FirstOrderIIRFilter.h:18</a></div></div>
<div class="ttc" id="class_first_order_i_i_r_filter_html_aff8c38c9281f6920f0715485f22fd948"><div class="ttname"><a href="../../dc/d6f/class_first_order_i_i_r_filter.html#aff8c38c9281f6920f0715485f22fd948">FirstOrderIIRFilter::_alpha</a></div><div class="ttdeci">T2 _alpha</div><div class="ttdef"><b>Definition:</b> <a href="../../da/d73/_first_order_i_i_r_filter_8h_source.html#l00058">FirstOrderIIRFilter.h:58</a></div></div>
<div class="ttc" id="class_first_order_i_i_r_filter_html_a3b3db52338d746113e81c4004e2d297a"><div class="ttname"><a href="../../dc/d6f/class_first_order_i_i_r_filter.html#a3b3db52338d746113e81c4004e2d297a">FirstOrderIIRFilter::FirstOrderIIRFilter</a></div><div class="ttdeci">FirstOrderIIRFilter(T2 alpha, T &amp;initialValue)</div><div class="ttdef"><b>Definition:</b> <a href="../../da/d73/_first_order_i_i_r_filter_8h_source.html#l00036">FirstOrderIIRFilter.h:36</a></div></div>
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